Electrotype-locking apparatus.



PATENTED SEPT. 10. 1907.

J. J. FLOYD. ELEGTROTYPB LOCKING APPARATUS. APPLICATION FILED IAYhl, 1907.

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land slotted at e3, to receiye a pin e* UNTTEE STATES PATENT OFFICE. l

JOHN J. FLOYD, OF BOSTON, MASSACHUSETTS.

ELEeTnoTYPE-LOGKING ABPARATUS.

Specification of Letters Patent.

PatentedSept.l 10190'i..-

Applicatie, and' -1, 19o7. serial 110.371.361..

To all-'whom 'it concern:

Be it known that I, JOHN J. Ftovn, a citizen of thel 'United States, residing in Boston, county of.Suffo1k,

and State of Massachusetts, have invented an Improvement in Electrotype-Locking Apparatus; of which the,

4following description, in connection with the accompanying drawing, is a specification, like letters on the v tial, to insure good printing, that the plates be held firmly and be capable of being adjusted accurately to so called hair lines.A To provide for holding `and adjusting such plates I have provided means which I will hereinafter more fully describe, the particular features of my invention being set forth in the claims'at the end of this specification. p

Figure'l is a plan view of a block and plateshown confined to the block by two 'of my novel locking devices or catches; Fig. 2 is a partial'sectioniin the line 1:, Fig. 1, showing the ltool employed to manipulate the locking device; Fig. 3 is a like view with the parts in'a different position; Fig. 4 is apsection of Fig. 2 in the line x; Fig. 5 is a section of Fig. 3 in the line if, Fig.l 6 is a detail showing the notched shells and lsprings acting normally to contractthe same; Fig. 7 is a detail showing the shellsin side elevation.

The block A` ,of metal' isboreditransversely and lengthwise as at A7 and the circular bore holes 'are slitted, as shown at A2, the slits opening in the Itop of the block. The bore holes, any number of which may be` used,are each cut, as shown at A3 to present a series of teeth or holding notches.

The lockingdevice or .catch B, any desired number of which may be used, that depending on the size of the electrotype plate vC, six or more such devices being. commonly employed with each plate,

is fitted into the circular bores A. The locking devices are all alike, so I needparticularly to describe but-one of them. The locking device B comprises essentially a body having depending ears d bored for the reception of an expand- D, the latter having its B provided with an annular groove bA at one side of which is a stop collar b2 iatis normally held against one of the lugs of the body by a spring b, the outer end of whichabuts a nut b* screwed onto the threaded end of the bolt. The in ner end of this spring abuts a depending portion e of an adjustable plate e* having a plate engaging portion e2 rising :from the body, the depending portion e acted upon by the spring being held normally in the position shown in Fig. 2, the spring also serving normally to hold the bolt in the position Fig. 2.

Between the ears d, d of locking device B are located two shells f, fone of which is shown externally in Fig. 7,

each shell being concave-convex in cross section .and provided near its opposite ends witha series of teeth 2, and a space 3 shown best in- Fig. 7. lIn the space?) I apply a steel spring 4 that acts normally to contract ythe shells when the bolt sin the thus withdrawing the teeth of the shells romtheteeth Aaof the boresin the block. The body of the locking grooves b. so as to'serveas holding means forthe portion of the electrotype plate C `to be held in adjusted position by the locking device, but

rather the edge f the plate willbe engaged by the edge e2 of the platee', before-described, which .plate may be adjusted on the locking device line adjustments of theelectrtype plat`.

It be understood l I y longitudinally 0f a very` fine adjustment; the teeth ofthe shell dercut portion of the projection B"I or shim ofmetal to threbylengthen,

v desired position to fornr a holding device for the eleetrotype.-

tool H comprising a lyir'itlija''handle hf in an abutment h2. In using the tool, `I insert the one ofthe slots A2 i of the catch, I tipthe tool in the direction of the arrow` b3. The withdrawal of the bolt' brings' portions of the bolt of smaller diameter between the theshell so that the spring 4 acting normally may contract the shells, withdrawing their teeth from the teeth A3 cut in the bores of the block, and with the tool yet in the position stated lthe carriage may be slid in either direction, the'withdgawi'ng of the tool permitting the spring b3 toact aridv move the bolt from the position Fig. 3 intothe position Fig. 2, thus expanding the shells -from the position shown in Fig., `5 into the position offthe boi7es.

The construction above described constitutes a selfacting and self-locking catch'for as Vsoon as the tool is removed after having adjusted the catch, the shells are expanded automatically to bring the teth'thereon into engagemert with the teeth of the plug, thus locking the catch in its adjusted position.

and desire to secure.. byl Letters Patent iszlocking `device including separable toothed shells, and

position Figs. 3 and 5.,.`

device has a lip B4 that is 'projected thronghnone of the holding projection Bf thatihflld"ofF-the projection may be brought intoany- Y 1 51011'8?! il' lnto the annulargroove biof the bolt, and with the abutment -h2 `resting on the projection B9.

Fig. 2, withdrawing-the bolt and compressing the spring projections 10 of .f

shown in lig. 4, where said teeth engage `the 'teethAs' Y preferably the lip B* -will not directly engage the' eectrotype plate,'but

B to'provide'lfor hairune device (is movable; hecatch B and'toscure To adjust the1catch, I' lower prong hof-a i Having described my invention, what I claim as new means to cause the teeth of said shellsfto engage the teeth of the block.

2. In apparatus of the class described, a block having crossing grooves provided with teeth, combined with a plate locking device including a body, toothed shells, and

n device to move said shells one toward the other to effect the disengagement of the teeth of the shells from the teeth of the block,

3. In apparatus of the class described, a block having crossing grooves provided withteeth, combinedA with a plate locking device including a body, toothedhells, a device to move said shells outwardly that their teeth may engage the teethof the block, and means acting normally to contract the shells.

4.In apparatus of the class described, a grooved block and a locking device having a projecting portion exposed `at the top of said block, combined with a plate-engaging device carried by the locking device and movable longitudinally`the1eon, and meansto move said plate-engaging device on said locking device to provide for hair-line adjustments of a stereotype plate on said block.

5. In apparatus of the class described. a plate locking device comprising a body having a plate-positioning projection, a cam bolt, two shells, a spring to move said bolt in a direction and normally hold the same in a position to move the shells away one from th'e other.

6. In apparatus of the class described, a plate locking device comprising a bodyhaving aplate-positioning projection, a cam bolt, two shells, a spring to move said bolt in a direction and normally hold the same in a position to move the shells awayone from the other, a spring encircling said shells and -lnoving the same one toward the other and said:v bolt when the latter is held outwardly in its inoperative position.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN J. FLOYD.

Witnesses Lows C. SMITH, MARGARET A. DUNN. 

